Power-Line Carrier Terminal Control Apparatus, System, and Method

Patent metadata

Field	Value
Publication number	US-2017244792-A1
Application number	US-201715588130-A
Country	US
Kind code	A1
Filing date	May 5, 2017
Priority date	Nov 7, 2014
Publication date	Aug 24, 2017
Grant date	—

Abstract

A power-line carrier (PLC) terminal control apparatus, system, and method, where the PLC terminal control apparatus is configured to receive a subscription request sent by a PLC terminal system, where the subscription request includes an identifier of the PLC terminal system and a topic for controlling the PLC terminal system, establish a correspondence between the topic and the identifier of the PLC terminal system in a mapping table according to the subscription request, send a subscription response message to the PLC terminal system according to the correspondence, where the subscription response message includes the topic, receive a control message published by a message queuing telemetry transport (MQTT) publisher, where the control message includes a control word and the topic, and the control word controls an operation performed based on the topic, and send the control message to the PLC terminal system according to the correspondence.

First claim

What is claimed is:

1 . A power-line carrier (PLC) terminal control apparatus, applied to a PLC terminal control system, wherein the PLC terminal control system comprises the PLC terminal control apparatus, a PLC terminal system, and a message queuing telemetry transport (MQTT) publisher, wherein the PLC terminal control apparatus establishes a PLC connection to the PLC terminal system, and an Ethernet connection to the MQTT publisher, and wherein the PLC terminal control apparatus, comprises:
a memory comprising instructions; and a processor coupled to the memory, wherein the instructions cause the processor to be configured to:
receive a subscription request sent by the PLC terminal system, wherein the subscription request comprises an identifier of the PLC terminal system and a topic for controlling the PLC terminal system;
establish a correspondence between the topic and the identifier of the PLC terminal system in a mapping table according to the subscription request;
send a subscription response message to the PLC terminal system according to the correspondence, wherein the subscription response message comprises the topic;
receive a control message published by the MQTT publisher, wherein the control message comprises a control word and the topic, and wherein the control word controls an operation performed based on the topic; and
send the control message to the PLC terminal system according to the correspondence.

2 . The apparatus according to claim 1 , wherein the instructions further cause the processor to be configured to:
receive, before receiving the subscription request sent by the PLC terminal system, a registration request sent by the PLC terminal system, wherein the registration request carries the identifier of the PLC terminal system; record the identifier of the PLC terminal system in the mapping table according to the registration request; send a registration response message to the PLC terminal system; search the mapping table according to the identifier of the PLC terminal system in the subscription request to obtain an entry comprising the identifier of the PLC terminal system when establishing the correspondence between the topic and the identifier of the PLC terminal system; and record the topic in the entry.

3 . The apparatus according to claim 2 , wherein the PLC terminal system comprises a PLC terminal and a PLC front-end (PFE) connected to the PLC terminal, wherein the identifier of the PLC terminal system is an identifier of the PFE, and wherein the apparatus further comprises:
an MQTT broker coupled to the processor and the memory; and a PLC data concentrator (PDC) connected to the MQTT broker and coupled to the processor and the memory, wherein the instructions cause the PDC to be configured to:
receive the subscription request sent by the PFE, wherein the subscription request comprises a PLC frame header and an MQTT subscription message, wherein the identifier of the PFE is carried in the PLC frame header, and wherein the topic is carried in the MQTT subscription message;
search the mapping table according to the identifier of the PFE to obtain the entry comprising the identifier of the PFE;
record the topic in the entry;
delete the PLC frame header in the subscription request to obtain the MQTT subscription message;
perform Ethernet encapsulation on the MQTT subscription message; and
send the encapsulated MQTT subscription message to the MQTT broker, and
wherein the instructions cause the MQTT broker to be configured to receive the encapsulated MQTT subscription message.

4 . The apparatus according to claim 3 , wherein the instructions further cause the MQTT broker to be configured to send the subscription response message to the PDC, wherein the subscription response message is an Ethernet-encapsulated MQTT response message, wherein the MQTT response message comprises the topic, and wherein the instructions further cause the PDC to be configured to:
receive the subscription response message; decapsulate the subscription response message to obtain the MQTT response message; search the mapping table according to the topic to obtain the identifier of the PFE; add the PLC frame header comprising the identifier of the PFE to the MQTT response message; and send, to the PFE, the MQTT response message to which the PLC frame header is added.

5 . The apparatus according to claim 3 , wherein the instructions further cause the PDC to be configured to:
receive the control message forwarded by the MQTT broker, wherein the control message is an Ethernet-encapsulated message sent by the MQTT publisher to the MQTT broker; remove the Ethernet encapsulation from the control message; add the PLC frame header comprising the identifier of the PFE to the control message according to the correspondence between the topic and the identifier of the PFE in the mapping table; and send, to the PFE, the control message to which the PLC frame header is added.

6 . The apparatus according to claim 4 , wherein the instructions further cause the PDC to be configured to:
receive the control message forwarded by the MQTT broker, wherein the control message is an Ethernet-encapsulated message sent by the MQTT publisher to the MQTT broker; remove the Ethernet encapsulation from the control message; add the PLC frame header comprising the identifier of the PFE to the control message according to the correspondence between the topic and the identifier of the PFE in the mapping table; and send, to the PFE, the control message to which the PLC frame header is added.

7 . A power-line carrier (PLC) terminal control system, comprising:
a PLC terminal control apparatus; a PLC terminal system; and a message queuing telemetry transport (MQTT) publisher, wherein the PLC terminal control apparatus establishes a PLC connection to the PLC terminal system, and an Ethernet connection to the MQTT publisher, and wherein the PLC terminal control apparatus, comprises:
a memory comprising instruction; and
a processor coupled to the memory, wherein the instructions cause the processor to be configured to:
receive a subscription request sent by the PLC terminal system, wherein the subscription request comprises an identifier of the PLC terminal system and a topic for controlling the PLC terminal system;
establish a correspondence between the topic and the identifier of the PLC terminal system in a mapping table according to the subscription request;
send a subscription response message to the PLC terminal system according to the correspondence, wherein the subscription response message comprises the topic;
receive a control message published by the MQTT publisher, wherein the control message comprises a control word and the topic, and wherein the control word controls an operation performed based on the topic; and
send the control message to the PLC terminal system according to the correspondence.

8 . The system according to claim 7 , wherein the instructions further cause the processor to be configured to:
receive, before receiving the subscription request sent by the PLC terminal system, a registration request sent by the PLC terminal system, wherein the registration request carries the identifier of the PLC terminal system; record the identifier of the PLC terminal system in the mapping table according to the registration request; send a registration response message to the PLC terminal system; search the mapping table according to the identifier of the PLC terminal system in the subscription request to obtain an entry comprising the identifier of the PLC terminal system when establishing the correspondence between the topic and the identifier of the PLC terminal system; and record the t

Assignees

• Huawei Tech Co Ltd

Inventors

• Yin Bin
• Lei Xin
• Lin Mujia
• Zhou Yun

Classifications

• H04L2212/00

  Encapsulation of packets · CPC title

• H04B3/54 Primary

  Systems for transmission via power distribution lines · CPC title

• H04B2203/5408

  using protocols · CPC title

• H04B2203/5445

  Local network · CPC title

• H04L67/125 Primary

  involving control of end-device applications over a network · CPC title